Reintroduction plan of the endemic subspecies Daito scops owl <i>Otus elegans interpositus</i> on Kita-daito Island ―Study Group for Conservation of the Daito Scops Owl―

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  • 北大東島における亜種ダイトウコノハズク<i>Otus elegans interpositus</i>の再導入計画 ―ダイトウコノハズク保全研究グループ―

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<p>The final aim of this study is to reestablish population of the endemic subspecies Daito Scops Owls on Kita-daito Island, where the owls exterminated 30-40 years ago, and to diversify the risk of their extinction on Minami-daito Island. We aim to gather fundamental information about carrying capacity of owls on Kita-daito Island. We currently confirmed by using playback of hooting that Daito scops owls do not inhabit on Kita-daito Island. We described three significant distribution patterns of territories on Minami-daito Island, high-density area of territories, area that owls do not depend on a relatively forest, and area that nest boxes attract breeding pairs. According to those information, aerial photographs, and field surveys on Kita-daito Island, we examined suitable habitats for their breeding, and estimated the possible number of owlsʼ breeding territories. In addition, we compared the number of main foods of the owls, cockroaches and huntsman spiders during a winter season between Kita-daito and Minamidaito Islands. It is possible that 49 breeding pairs settle on Kita-daito Island. The number of main cockroaches and spiders did not differ between two islands. It is inferred that owls can overwinter on Kita-daito Island, and so maintain their population. </p>

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Details 詳細情報について

  • CRID
    1390848647559112960
  • NII Article ID
    130007919058
  • DOI
    10.32215/pronatura.29.0_83
  • ISSN
    21897727
    24320943
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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